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Fructose is, as the name suggests, the main sugar in fruit. In the human body, fructose is the primary sugar supplying sperm and adipose cells.
The first step involves the enzyme Fructokinase, which phosphorylates fructose into Fructose-1-phostphate. As in the glucose pathway, phosphorylation prevents the free movement of fructose through the plasma membrane, ensuring that it remain in the cell.